Electronic device, signal transmission device, and radio communication terminal

• US 20060121933A1
• Filed: 11/30/2005
• Published: 06/08/2006
• Est. Priority Date: 12/07/2004
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ikeda, Masayuki
• Application Number:
  US11/291,143
• Publication Number:
  US 20060121933A1
• Time in Patent Office: Days
• US Class Current: 455/550.100
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0225 Rotatable telephones, i.e. the body parts pivoting to an open position around an axis perpendicular to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 2250/16 including more than one display unit
• CPC Class Codes: H04M 2250/52 including functional features of a camera constructional features concerning the integration of cameras in portable phones H04M1/0264
• CPC Class Codes: H04N 2007/145 Handheld terminals
• CPC Class Codes: H04N 7/142 Constructional details of the terminal equipment, e.g. arrangements of the camera and the display

Abstract

An electronic device includes: a generator that generates transmission data in a form of a serial signal; an oscillator that generates a carrier wave; a modulator that modulates the carrier wave with the signal from the generator; a line transmission channel that transmits a signal modulated in the modulator; a demodulator that receives and demodulates the signal transmitted via the line transmission channel; a receiver that receives the transmission data according to a demodulated signal demodulated in the demodulator; and a common housing that accommodates at least the modulator and the demodulator.

Claims

1. An electronic device, comprising:

a generator that generates transmission data in a form of a serial signal;

an oscillator that generates a carrier wave;

a modulator that modulates the carrier wave with the signal from the generator;

a line transmission channel that transmits a signal modulated in the modulator;

a demodulator that receives and demodulates the signal transmitted via the line transmission channel;

a receiver that receives the transmission data according to a demodulated signal demodulated in the demodulator; and

a common housing that accommodates at least the modulator and the demodulator.

3. The electronic device according to claim 1, wherein:

the modulator performs modulation by multiplying the carrier wave by the serial signal.

4. The electronic device according to claim 1, wherein:

the modulator modulates the carrier wave through QPSK modulation using the serial signal.

8. The electronic device according to claim 1, wherein:

the oscillator is formed of an oscillator circuit and a phase locked loop (PLL) that multiplies a periodical pulse train generated in the oscillator circuit.

9. The electronic device according to claim 1, wherein:

the line transmission channel includes a switch, and is thereby able to switch transmission and reception directions.

2. An electronic device, comprising:

a generator that generates transmission data in a form of a serial signal;

an oscillator that generates a carrier wave;

a synchronizing signal generator that generates a synchronizing signal;

a modulator that modulates the carrier wave with the signal from the generator;

a synthesizer that synthesizes a modulated signal modulated in the modulator and the synchronizing signal from the synchronizing signal generator into a signal;

a line transmission channel that transmits the signal synthesized in the synthesizer;

a separator that receives and separates the signal transmitted via the line transmission channel into the modulated signal and the synchronizing signal;

a demodulator that demodulates the modulated signal separated in the separator according to the synchronizing signal separated in the separator;

a receiver that receives the transmission data according to a demodulated signal demodulated in the demodulator; and

a common housing that accommodates at least the modulator and the demodulator.

5. The electronic device according to claim 2, wherein:

the synchronizing signal is a horizontal synchronizing signal to maintain synchronization with a scanning line.

6. The electronic device according to claim 2, wherein:

the synchronizing signal is generated by dividing the carrier wave generated in the oscillator.

7. The electronic device according to claim 2, wherein:

the demodulator performs synchronization detection that regenerates and uses a frequency of the carrier wave in sync with the synchronizing signal.

10. A radio communication terminal, comprising:

a first housing;

a second housing;

a connector that links the first housing to the second housing in such a manner that a positional relation between the first housing and the second housing is changeable;

an outside radio communication antenna that is outfitted to one of the first housing and the second housing;

an outside radio communication control portion that is mounted to the first housing and is chiefly responsible for control performed on an outside radio communication via the outside radio communication antenna;

a display mounted to the second housing;

a line transmission channel that passes through the connector and performs an internal communication between the first housing and the second housing;

a first signal transmitter and receiver mounted to the first housing;

a second signal transmitter and receiver mounted to the second housing;

a first internal signal transmission controller that is mounted to the first housing and is responsible for switching between transmission and reception of the internal communication performed via the line transmission channel and control of the internal communication; and

a second internal signal transmission controller that is mounted to the second housing and is responsible for switching between transmission and reception of the internal communication performed via the line transmission channel and control of the internal communication.